As Twitchy reported, 12 Senators have signed a letter pledging to defund Obamacare, although five names that were expected to be on that letter didn’t materialize. One of those was Texas Sen. John Cornyn, who offered something of an explanation in reply to this tweet:

@JohnCornyn You had better get on the defund Obamacare train! We're watching you.

Cornyn, it seems, has decided to wait for another train. What route he intends to take is unclear, but Ted Cruz, the “very junior” Senator from Texas, is on board with the effort to defund and going full throttle.